Remove traces of OpenNMS from setup

Hopefully I won't have to mess with a big Java project anytime soon.
my-helm.el: fix compile warnings.
rm erc bits: I can always rescue from history if I need to
my-org.el: fix compile errors.
new my-find.el for the common find handling bits
my-email.el: clean-up and a few fixes.
my-package.el: fix compile errors
all: more clean-ups

* added my-vars.el for common variables.
init.el: removing cruft